I recently got a few plastic serving pieces (on clearance, yippee!) at Target from the Liberty of London collection and have now been thinking on developing a full set of outdoor entertaining-ware. That way you're not worrying about things breaking but you're not using paper plates, which I always do.
But, I just started hunting for these pieces and want to wait to purchase until I decide what kind of theme I want. Flowers, geometric, flourishes, bright colors, simple... I'm not sure yet and my tendency is to impulse buy, then nothing matches and I'm discontent. However, I figured while I wait for my outdoor entertaining style to congeal, I'd share my favorite finds!
citrus cup from Pier 1. I always for get about Pier 1 when I'm shopping for home goods, but I'm going to go out on a limb and say they could be one of the best places to find cheap, outdoor dining pieces. Maybe not the most unique, but affordable.
Here is a great set, all matching for your outdoor BBQ party! From World Market, I love that they've thought of everything, bin for the drinks, caddy for the condiments and tray to hold everything, including extra ice. (Plus, if you sign up for their emails, they often send out coupons for $10 off a purchase of $30 or more! Bring the price of these guys to almost nothing).
Acrylic glasses in 2 sizes from Crate & Barrel. Simple with a little color.
Crate & Barrel comes out with a new set every summer. And the set of 4 is only $19.95 right now. And for some of the best vintage stuff around...etsy.